extends CharacterBody3D

@export var speed = 14
@export var fall_acc = 75
@export var jump_impulse = 50
@export var bounce_impulse = 40

var target_vel = Vector3.ZERO


func _physics_process(delta: float) -> void:
	# Move
	var dir = Vector3.ZERO
	if Input.is_action_pressed("move_left"):
		dir.x -= 1
	if Input.is_action_pressed("move_right"):
		dir.x += 1
	if Input.is_action_pressed("move_forward"):
		dir.z -= 1
	if Input.is_action_pressed("move_back"):
		dir.z += 1
	
	if dir != Vector3.ZERO:
		dir = dir.normalized()
		$Pivot.basis = Basis.looking_at(dir)
	
	# Ground vel. (overwrite y later)
	target_vel = dir * speed
	
	# vert. vel.
	target_vel.y = 0
	if not is_on_floor():
		target_vel.y -= fall_acc * delta 
		
	# Jump
	if is_on_floor() and Input.is_action_just_pressed("jump"):
		target_vel.y = jump_impulse
		
	# Iterate through all collisions that occurred this frame
	for index in range(get_slide_collision_count()):
		var collision = get_slide_collision(index)

		# Avoid calling collision again after deleting
		if collision.get_collider() == null:
			continue

		if collision.get_collider().is_in_group("mob"):
			var mob = collision.get_collider()
			# hitting it from above.
			if Vector3.UP.dot(collision.get_normal()) > 0.1:
				mob.squash()
				if !is_on_floor():  # TODO: This does not seem to work here
					target_vel.y = bounce_impulse
				break
		
	velocity = target_vel
	move_and_slide()